Hitachi Deskstar 1 TB making alot of noise

Hello,

I bought a Hitachi 1 TB Deskstar HDD about a month ago. Since then it's been making noise constantly. I've seen alot of noises described as clicking, scratching, and grinding but I honestly can't differentiate. The noise syncs with the light on my case. I have a two of these drives and the second is in an htpc computer. I swapped the drive out with that one and the noise was still there. Im positive it's the hdd though, so i'm not sure if the noise is just a common thing with hitachi drives or if both are experiencing the same problem as they were both bought from the same compusa around the same time and were probably from the same shipment. My pc also seems slower than it should be, however the hdd was bought at the same time as all of the other components, so I can't be sure the drive's the problem. I'm currently running a phenom ii x4 955 oc'd to 3.6 ghz with an msi 2 gb 6950 and can only get playable framerates while raiding in wow with everything set to low. (I consider playable to be 30-40 fps)

TL;DR Are Hitachi drives just noisy or are both of mine failing?